A number agreed to correction being humble (7)
I believe the answer is:
degrade
'humble' is the definition.
(degrading is a kind of humbling)
'a number agreed to correction' is the wordplay.
'a number' becomes 'd' (D is an example).
'to correction' indicates anagramming the letters (I've seen this in other clues).
'agreed' with letters rearranged gives 'egrade'.
'd'+'egrade'='DEGRADE'
'being' is the link.
(Other definitions for degrade that I've seen before include "Put down" , "Disgrace, lower in status" , "Decompose chemically" , "Demean, cheapen" , "Reduce in worth" .)